**Abstract**

Transition from preschool setting to formal schooling is seen as one of the most important transition in one's life trajectory, which may influence many people's future transition experiences. Research has confirmed that if children are prepared for school life from different perspectives when they enter formal schooling, they are more likely to succeed at school and in future life. This chapter uses Bronfenbrenner's ecological theory to present how the different environments influence children's transition with kindergartens' roles and practices being the focus. By doing so, this chapter aims to inspire better policies and practices concerning transition in Norway and beyond.

**Keywords:** ecological theory, kindergarten, Norway, primary school, transition
